LM675T Power Amplifier IC Equivalent & Substitute Parts

Part Overview

The LM675T is a power amplifier integrated circuit manufactured by Texas Instruments, designed for single-circuit power amplification applications. The device is packaged in TO-220-5 with formed leads for through-hole mounting. The LM675T is currently in Last Time Buy status, indicating that the original manufacturer part number will be discontinued. Identifying equivalent and substitute parts ensures design continuity and supply chain reliability for applications requiring this power amplifier topology.

Substiute Parts

LM675T

Texas InstrumentsIn Stock: 1453LM675T Datasheet

Current PartRFQ

LM675T/LF02

Texas InstrumentsIn Stock: 957LM675T/LF02 Datasheet

DirectRFQ

LM675T/NOPB

Texas InstrumentsIn Stock: 20914LM675T/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM675T are identified based on strict electrical and mechanical parameter matching. The substitution criteria are:

Electrical Parameters (Must Match):

• Amplifier Type: Power
• Number of Circuits: 1
• Slew Rate: 8 V/µs
• Gain Bandwidth Product: 5.5 MHz
• Current - Input Bias: 200 nA
• Voltage - Input Offset: 1 mV
• Current - Supply: 18 mA
• Current - Output / Channel: 3 A
• Voltage - Supply Span (Min): 10 V
• Voltage - Supply Span (Max): 60 V
• Operating Temperature: 0°C to 70°C

Mechanical Parameters (Must Match):

• Package / Case: TO-220-5 Formed Leads
• Mounting Type: Through Hole
• Supplier Device Package: TO-220-5

Compliance Parameters (Must Match):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

All identified substitute parts meet these criteria and are manufactured by Texas Instruments under the LM675 base product number with different packaging designations.

Parameter Comparison

Engineering Selection Recommendations

LM675T/NOPB is the primary substitute for the LM675T. This part number variant is in Active product status with the highest available inventory (20,880 pieces), ensuring long-term supply availability. All electrical and mechanical parameters are identical to the LM675T. The /NOPB designation indicates lead-free plating, maintaining ROHS3 compliance. This part is suitable for immediate design transitions from the Last Time Buy LM675T.

LM675T/LF02 is an alternative substitute with identical electrical and mechanical specifications. This part is also in Active product status. Inventory availability is lower (867 pieces) compared to LM675T/NOPB. The /LF02 designation represents a specific packaging variant. This part is suitable for applications where the LF02 packaging specification is required or preferred.

Both substitute parts maintain full compatibility with existing circuit designs using the LM675T, as all critical parameters—including slew rate, gain bandwidth product, supply voltage range, output current capability, and thermal characteristics—are identical. The TO-220-5 package geometry and through-hole mounting remain unchanged, allowing direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can LM675T/NOPB be used as a direct replacement for LM675T in existing designs?

A: Yes. LM675T/NOPB is electrically and mechanically identical to LM675T. All functional parameters, package dimensions, and pin configurations match. The /NOPB designation indicates lead-free plating compliance. No circuit modifications are required.

Q: What is the difference between LM675T/NOPB and LM675T/LF02?

A: Both parts are functionally equivalent with identical electrical specifications. The difference lies in the packaging designation suffix. /NOPB and /LF02 represent different packaging variants from Texas Instruments. Selection between these variants depends on specific procurement or manufacturing requirements.

Q: Why is the original LM675T marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments will discontinue this specific part number designation. Customers are advised to transition to active product variants such as LM675T/NOPB or LM675T/LF02 to ensure continued supply availability.

Q: Are all three part numbers (LM675T, LM675T/NOPB, LM675T/LF02) pin-compatible?

A: Yes. All three part numbers use the TO-220-5 package with formed leads. Pin configuration, spacing, and through-hole mounting requirements are identical. PCB designs require no modification for substitution.

Q: Do the substitute parts meet the same compliance standards as the original LM675T?

A: Yes. Both LM675T/NOPB and LM675T/LF02 are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the original LM675T specifications. REACH status is Unaffected for all three variants.

Q: What is the recommended substitute if maximum inventory availability is required?

A: LM675T/NOPB is recommended, with 20,880 pieces in stock compared to 867 pieces for LM675T/LF02. This ensures the longest supply chain security for production requirements.

Q: Can these parts be used in applications requiring extended temperature ranges beyond 0°C to 70°C?

A: No. All three part numbers are specified for 0°C to 70°C operating temperature. Applications requiring extended temperature ranges require alternative device selection outside this product family.